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<p>This study investigates the effects of severe plastic deformation (80% cold-rolling) and subsequent annealing treatment (780&#xa0;°C for 1–20&#xa0;min) on the microstructure and crystallographic texture evolution of Ti-15V-3Sn-3Cr-3Al (Ti-15333). EBSD analysis revealed that cold rolling produced elongated grains, numerous low-angle grain boundaries (LAGBs), and pronounced shear bands (SBs). These deformation-induced defects served as preferential nucleation sites for recrystallization. A high density of SBs was observed in deformed <i>γ</i>-fiber grains, which exhibited a high Taylor factor (M), whereas <i>α</i>- and <i>θ</i>-fiber grains showed low M values. After partial annealing for 1&#xa0;min, the evolution of {332}&lt;<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\overline{11 }3\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mover> <mn>11</mn> <mo>¯</mo> </mover> <mn>3</mn> </mrow> </math></EquationSource> </InlineEquation>&gt; and {221}&lt;<InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\overline{11 }4\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mover> <mn>11</mn> <mo>¯</mo> </mover> <mn>4</mn> </mrow> </math></EquationSource> </InlineEquation>&gt; components was observed. With further annealing, a texture transition occurred from deformation-induced <i>α</i>-fiber and E ({111}&lt;110&gt;) extures to recrystallized <i>γ</i>-fiber F {111}&lt;112&gt; and (24, 0-40, 45)° fiber texture. Intermediate annealing stages were characterized by dominant Cube orientations, which disappeared after 20&#xa0;min due to grain coarsening. This study demonstrates how texture refinement and strain-induced recrystallization can optimize the strength-ductility trade-off in Ti-15333.</p>

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Microstructure and Crystallographic Texture Evolution in a Severely Deformed and Annealed β-Ti Alloy Sheet

  • 期刊论文

  • 发表日期：

    2025年11月14日

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  • Prince Setia,
  • Nikhil Tripathi,
  • Mattipally Prasad,
  • Aman Gupta,
  • Shi-hoon Choi

摘要

This study investigates the effects of severe plastic deformation (80% cold-rolling) and subsequent annealing treatment (780 °C for 1–20 min) on the microstructure and crystallographic texture evolution of Ti-15V-3Sn-3Cr-3Al (Ti-15333). EBSD analysis revealed that cold rolling produced elongated grains, numerous low-angle grain boundaries (LAGBs), and pronounced shear bands (SBs). These deformation-induced defects served as preferential nucleation sites for recrystallization. A high density of SBs was observed in deformed γ-fiber grains, which exhibited a high Taylor factor (M), whereas α- and θ-fiber grains showed low M values. After partial annealing for 1 min, the evolution of {332}< \(\overline{11 }3\) 11 ¯ 3 > and {221}< \(\overline{11 }4\) 11 ¯ 4 > components was observed. With further annealing, a texture transition occurred from deformation-induced α-fiber and E ({111}<110>) extures to recrystallized γ-fiber F {111}<112> and (24, 0-40, 45)° fiber texture. Intermediate annealing stages were characterized by dominant Cube orientations, which disappeared after 20 min due to grain coarsening. This study demonstrates how texture refinement and strain-induced recrystallization can optimize the strength-ductility trade-off in Ti-15333.